Air-brake.



-G.. W. McMUNN 6: A. G. HOWELL.

AIR BRAKE.

APPLICATION FILED Jun 25,1905.

Patented Sept. 22, 1908.

Witnesses UNITED STATES PATENT OFFICE.

(illUlttlli Wv MeMUNN AND ALLAN O. ILUWICLL, ()h IlT'lSllUltG, PENNSYLVANIA.

AIR-BRAKE.

Application filed June 25,

Patented Sept. 22, 1908.

1908. Serial No. 440,316.

To all whom itmuy concern:

Be it known that we, (lmoncn W. McMUNN and ALLAN l'lOWELL, citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvauia,'l1ave invented certain new and use- .ful .lm rovements in Air-Brakes, of which the fol owing is a specilication, reference being had therein to the accompanying drawmg.

This invention relates to air brakes, and the prin' ary object of our invention is the provision of positive and reliable means for releasing a brake cylinder when closing an angle cock.

A further object of ourinvcntion is to dispcnsc with the ordinary type'of release valve at present used in connection with a brake cylinder.

A still further ob'ect of our invention is to provide a novel angle cock for simultaneously controlling a train line, brake cylinder, and a combined brake cylinder and auxiliary reservoir.

A still further object of our invention is to prevent a brake cylinder from being released except by the closing of an angle cock. V

It is the present practice'to use a release .valve upon the brake cylinder of a car, and

provide said valve with outwardly extending rods that can be manipulated from either side of a car. Such a construction allows the release valve to be tam cred with by unthen specifically pointed out in the appended claims.

Referring to the drawirigsz-Figur 1. is-a diagrammatic view of a car, illustrating the connections between the train line, brake c linder, and the angle rocks at theends of tfi car, Fig. 2' is an elevation of a brake cylinder constructed in accordance with our 1nvolition, Fig. 31 is ahorizontal sectional View of an'angle cock constructed in accordance with oulinvention, and Fig. 4 is a longitudi nal sectional viewofthesame. I

In the accompanying drawings, 1 desigmeans for permanently controllin 1 males the outline of a freight car, 2 a combined brake cylinder and auxiliary reservoir, 3 a train line pipe, provided at each end with an angle cock 4 for hose connections 5. The angle cocks 4 are identical in construction, each angle cock having a plug 6, a cap 7, a spring 8, and a handle 9, these parts beinglpommon in the standard freight car angle coo To carry our invention into effect, we provide the body of each angle cock with a connection 10 for a pipe 11, said pipe communicating with the angle cock by virtue of an ad- (litional port 12 provided therefor in the bushing 13 of the cock, and in order to control the passage of air throu h this port, we provide the plug 6 with an adlitional ort 14. [he ipes 11' extend to the brake cy inder 2 are connected to a stand pipe 16, carried by the brake cylinder 2 and communicatin therewith. This stand pipe 16 is rovide with a globe valve 17 of a common orm as a the release of a brake cylinder. The bra e cylinder 2 is connected to the train line pipe 3 by a pipe 18, and the brake rigging and apparatus same as at present used. ith the angle cocks in the osition illustrated in the drawings, the bra e cylinder 2 is permitted to exhaust through the pipes 11, ports 12, plugs 6 and ports 14, and the train line 3 is closed. When the handle 9 of either angle cock is turned a quarter of a revolution to the right, the port 12 is closed and the train line opened.

of our invention will be fully un erstood from the foregoing description, and while in the drawings there is illustrated the preferred embodiments of construction, it is to be understood that theelemcnts therein can be varicd'or changed without departing-from the spirit of the mvention.

Having now described ourinvention what" we claim as new, is

1. The combination with an air brake cylinder, and a train pipe connecting therewith, of angle cocks carried by said train pipe, a stand pipe carried by said brake cylin er, a valve carried by said stand pipe, extensions carried by said angle cocks and connecting with said stand pipe, and movable plugs arran cd in said angle cocks for releasing said bra (e cylinder and closing said train pi e,

.3. The combination with an air bra '0 cyland y virtue of aT-connection 15 said pipes used in connection with. the frei ht car 1 is the It is thought that the utility and o. oration.

,inder, and a train pipe coimecting therewith, communicating with said cylinder independof angle cocks carried by said train pipe, a ent of said tram pipe, and movable plugs arstand pipe carried by said brake cylinder, extensions carried 1) said angle cocks and 5 connecting with sai stand pipe, and movable plugs arran ed in said a do cocks for releasing said bra e eylindei am closing said train ipe.

3. 'lhe combination with an air brake cyl- 10 inder and a train pipe connecting therewith,- of angle cocks carried by said train pipe and ranged in said ang e cooks for releasing said cylinder and closing said tram ipe.

In testimony whereof we a ix our sign'atures in the presence of two witnesses.

GEORGE W. MCMUNN. ALLAN C. HOWELL. Witnesses:

L. F. BECKER, MAX H. Snowvrrz. 

